The primary cause of the feud between the Capulets and Montagues in Shakespeare's "Romeo and Juliet" is not explicitly stated, allowing for various interpretations. The conflict exemplifies the destructive nature of family loyalty, honor, and pride. Both families are portrayed as aristocratic clans in Verona with a longstanding, bitter animosity, which spills into the streets and affects their communities. This feud becomes the backdrop for the tragic love story of Romeo Montague and Juliet Capulet, illustrating how entrenched rivalries can lead to violence and miscommunication. Consequently, love becomes entangled with hate, resulting in tragic consequences for both families.